#!/bin/sh
### BEGIN INIT INFO
# Provides: tuntox
# Required-start: $network $syslog
# Required-stop: $network $syslog
# Default-start: 2 3 4 5
# Default-stop: 0 1 6
# Short-description: This script takes care of starting and stopping the Tutnox daemon.
# Description: tuntox is a daemon for tunnelling TCP connections over the Tox protocol
#    Notes
#    Modeled after init script for NSCA written by Ethan Galstad (nagios@nagios.org)
### END INIT INFO

#
# If you want to use tuntox as a system service, do the following:
# cp tuntox /usr/bin/
# cp scripts/tuntox.debian-init /etc/init.d/tuntox
# update-rc.d tuntox defaults
#
# Edit the User ID below (it needs to be a number in static builds)
#

# User ID to which the program will drop
USERID=13

DESC="TCP-over-Tox daemon"
NAME=tuntox
DAEMON=/usr/bin/$NAME
DAEMON_CFG_DIR=/etc/tuntox/
PIDFILE=/var/run/$NAME/$NAME.pid
DAEMON_ARGS="-C $DAEMON_CFG_DIR -z -F $PIDFILE -U $USERID -d"
SCRIPTNAME=/etc/init.d/$NAME

# Exit if packages not installed
[ -x "$DAEMON" ] || exit 5

# Read configuration variable file if it is present
[ -r /etc/default/$NAME ] && . /etc/default/$NAME

# Load the VERBOSE setting and other rcS variables
[ -x /lib/init/vars.sh ] && . /lib/init/vars.sh

# Load the VERBOSE setting and other rcS variables
. /lib/init/vars.sh

# Define LSB log_* functions.
# Depend on lsb-base (>= 3.0-6) to ensure that this file is present.
. /lib/lsb/init-functions

mkdir -p /var/run/$NAME
chown $USERID /var/run/$NAME

#
# Function that starts the daemon/service
#
do_start()
{
    # Return value
    # 0 if daemon has been started
    # 1 if daemon was already started
    # 2 if daemon could not be started

    # Test if daemon already exist
    start-stop-daemon --test --start --quiet --pidfile $PIDFILE \
        --exec $DAEMON > /dev/null \
        || return 1
    # Start it if not
    start-stop-daemon --start --quiet --pidfile $PIDFILE \
        --exec $DAEMON -- $DAEMON_ARGS \
        || return 2
    # Add code here, if the process need to be ready to handle
    # request form service that depend on it. At last resort,
    # sleep some time.
    sleep 1s
}

#
# Function that stop the dameon
#
do_stop() {
    # Return value
    # 0 if daemon has been stopped
    # 1 if daemon was already stopped
    # 2 if daemon could not be stop
    # other if a failure occured
    ###
    # When nsca exits, clean lock file.
    start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 --pidfile $PIDFILE --name $NAME
    RETVAL="$?"
    # If process was already stop. Nothing to do. Exit with 1
    [ "$RETVAL" = 1 ] && return 1
    # If process could not be stop. Exit with 2
    [ "$RETVAL" = 2 ] && return 2
    # If the daemon is only run from initscript
    # and forks, wait for children to finish.
    # If this two condition are not satisfied the add code
    # that waits for the process to drop all resources that
    # could be needed by services started subsequently.
    # At a last resort, sleep for some time.
    start-stop-daemon --stop --quiet --oknodo --retry=0/30/KILL/5 --pidfile $PIDFILE --exec $DAEMON
    [ "$?" = 2 ] && return 2
    # Many daemon do not delete their pidfiles when they exit
    rm -f $PIDFILE
    return "$RETVAL"
}

#
# Function that sends a SIGHUP to the daemon
#
do_reload()
{
    #
    # A basic reload function. Not used.
    start-stop-daemon --stop --quiet --signal 1 --pidfile $PIDFILE --name $NAME
    return 0
}

case "$1" in
 start)
    [ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$NAME"
    do_start
    case "$?" in
        0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
        2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
        *) log_end_msg 1 ;; # Failed to start. Fatal
    esac
    ;;
 stop)
    [ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
    do_stop
    case "$?" in
        0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
        2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
        *) log_end_msg 1 ;; # Failed to stop. Fatal
    esac
    ;;
 #reload|force-reload)
 #    #
 #    # If do_reload() is not implemented then leave this comment out
 #    # and leave "force-reload" as an alias for "restart".
 #    #
 #    log_daemon_msg "Reloading $DESC" "$NAME"
 #    do_reload
 #    # Note : the basic do_reload always return 0
 #    log_end_msg "$?"
 #    ;;
 restart|force-reload)
    #
    # If the "reload" option is implemented then remove
    # the "force-reload" alias.
    log_daemon_msg "Restarting $DESC" "$NAME"
    do_stop
    case "$?" in
     0|1)
        do_start
        case "$?" in
         0) log_end_msg 0 ;;
         1) log_end_msg 1 ;; # Old process still running
         *) log_end_msg 1 ;; # Failed to start
        esac
        ;;
     *)
        # Failed to stop
        log_end_msg 1
        ;;
    esac
    ;;
 status)
    log_daemon_msg "Checking status of $DESC" "$NAME"
    status_of_proc -p $PIDFILE "$DAEMON" "$NAME"
    log_end_msg "$?"
    exit $?
    ;;
 *)
    # echo "Usage: $SCRIPTNAME {start|stop|restart|reload|force-reload|status}" >&2
    echo "Usage: $SCRIPTNAME {start|stop|restart|force-reload|status}" >&2
    exit 3
    ;;
esac

# ":" = "exit 0"
:
